FR2603105A1 - Method and device for local and instantaneous measurement of the absolute concentration of a chemical species in a reactive medium - Google Patents
Method and device for local and instantaneous measurement of the absolute concentration of a chemical species in a reactive mediumInfo
- Publication number
- FR2603105A1 FR2603105A1 FR8611857A FR8611857A FR2603105A1 FR 2603105 A1 FR2603105 A1 FR 2603105A1 FR 8611857 A FR8611857 A FR 8611857A FR 8611857 A FR8611857 A FR 8611857A FR 2603105 A1 FR2603105 A1 FR 2603105A1
- Authority
- FR
- France
- Prior art keywords
- reactive medium
- along
- chemical species
- predetermined direction
- sense
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6402—Atomic fluorescence; Laser induced fluorescence
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6408—Fluorescence; Phosphorescence with measurement of decay time, time resolved fluorescence
Landscapes
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Optics & Photonics (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
According to the invention, a first laser beam 1 coming from a laser generator 101 tuned to an absorption line of the species to be measured is made to propagate in the reactive medium 3 along a predetermined direction X' X and in a first sense, and a second laser beam 2 coming from the same tuned laser generator 101, but having a small predetermined delay, is made to propagate along the said predetermined direction, and in a sense opposite to the said first sense, a portion of the light energy which has been absorbed along the excitation beams 1, 2 and has caused the emission of fluorescence is collected along the said predetermined direction at two separate points A and B of the reactive medium 3 which are very close together, the fluorescence emitted by the two separate points A, B is measured in order to determine, for each of these two points A, B, a pair of fluorescence signals which are shifted in time, and the absolute concentration of the absorbent chemical species present in the reactive medium 3 is deduced from the measurements of the two pairs of fluorescence signals.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8611857A FR2603105B1 (en) | 1986-08-19 | 1986-08-19 | METHOD AND DEVICE FOR LOCAL AND INSTANT MEASUREMENT OF ABSOLUTE CONCENTRATION OF CHEMICAL SPECIES IN A REACTIVE MEDIUM |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8611857A FR2603105B1 (en) | 1986-08-19 | 1986-08-19 | METHOD AND DEVICE FOR LOCAL AND INSTANT MEASUREMENT OF ABSOLUTE CONCENTRATION OF CHEMICAL SPECIES IN A REACTIVE MEDIUM |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2603105A1 true FR2603105A1 (en) | 1988-02-26 |
FR2603105B1 FR2603105B1 (en) | 1988-12-02 |
Family
ID=9338379
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8611857A Expired FR2603105B1 (en) | 1986-08-19 | 1986-08-19 | METHOD AND DEVICE FOR LOCAL AND INSTANT MEASUREMENT OF ABSOLUTE CONCENTRATION OF CHEMICAL SPECIES IN A REACTIVE MEDIUM |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2603105B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0762114A2 (en) * | 1995-09-07 | 1997-03-12 | Basf Aktiengesellschaft | Apparatus for parallel two-photon fluorescence-correlation-spectroscopy measurements of a plurality of samples and its application to active-substance screening |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US397155A (en) * | 1889-02-05 | Tooth for horse hay-rakes | ||
US4362388A (en) * | 1980-11-17 | 1982-12-07 | Bethlehem Steel Corp. | Remote measurement of concentration of a gas specie by resonance absorption |
-
1986
- 1986-08-19 FR FR8611857A patent/FR2603105B1/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US397155A (en) * | 1889-02-05 | Tooth for horse hay-rakes | ||
US4362388A (en) * | 1980-11-17 | 1982-12-07 | Bethlehem Steel Corp. | Remote measurement of concentration of a gas specie by resonance absorption |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0762114A2 (en) * | 1995-09-07 | 1997-03-12 | Basf Aktiengesellschaft | Apparatus for parallel two-photon fluorescence-correlation-spectroscopy measurements of a plurality of samples and its application to active-substance screening |
EP0762114A3 (en) * | 1995-09-07 | 1998-05-06 | Basf Aktiengesellschaft | Apparatus for parallel two-photon fluorescence-correlation-spectroscopy measurements of a plurality of samples and its application to active-substance screening |
Also Published As
Publication number | Publication date |
---|---|
FR2603105B1 (en) | 1988-12-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |